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T-SQL CASE Clause: How to specify WHEN NULL
... for null, and can be verified even in SQL Server by using case statements etc.)
SELECT NULL = NULL -- Results in NULL
SELECT NULL <> NULL -- Results in NULL
So there is no true/false answer to the question, instead the answer is also null.
This has many implications, for example in
CAS...
Android AlertDialog Single Button
...tDialog.Builder(this);
builder.setMessage("Look at this dialog!")
.setCancelable(false)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
//do things
}
});
AlertDialog aler...
Regular expression to match a line that doesn't contain a word
...ly filtering out what you don't want: grep -v "hede" | grep -v "hihi" | ...etc.
– Olivier Lalonde
May 5 '14 at 22:08
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Compare two files in Visual Studio
...his diff tool provide any useful feature like copy to left, copy to right, etc? When I diff working copy with the server version I sometimes wish to undo some of the changes and has to do manual copy pasting.
– Samuel
Feb 12 '14 at 10:24
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SQL server query to get the list of columns in a table along with Data types, NOT NULL, and PRIMARY
...
This gives wrong lengths for the nvarchar, etc type of columns. It gives the byte length that is twice as much as the length in the column type.
– Andrew Savinykh
May 17 '12 at 21:04
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can't push to branch after rebase
... branch to the latest commit on the target, and unstashing your changes in order on top.
(This explains why you may get multiple conflict resolution prompts when doing a rebase vs the one conflict resolution you may get with a merge. You have the opportunity to resolve a conflict on EACH commit th...
Is a one column table good design? [closed]
.... state abbreviations; Zip codes that we ship to; words legal in Scrabble; etc.
2) Sparse binary attribute, ie., in a large table, a binary attribute that will be true for only a very few records. Instead of adding a new boolean column, I might create a separate table containing the keys of the re...
Is there a way to make GHC provide the type class constraints of typed holes?
... should be.
These potential instances exist:
instance Show Ordering -- Defined in ‘GHC.Show’
instance Show Integer -- Defined in ‘GHC.Show’
instance Show a => Show (Maybe a) -- Defined in ‘GHC.Show’
...plus 22 others
...plus 11 instances i...
How to tell which version of a gem a rails app is using
...ill print out what gems, dependencies, and versions are installed, frozen, etc.
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Python idiom to return first item or None
...ave a 0, also replaced by []. If you have False in there, also replaced. Etc. You might get away with this in a specific case, but this is a bad habit to develop.
– steveha
Nov 22 '09 at 4:10
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